Summary of the story: Yan Xuanche, the crown prince of Yan, was frail and sick, and indulged in literary pleasures. He was recognized by both the government and the public as a useless prince. His younger brother, the second prince Yan Zhaohong, had great military exploits, was ambitious, formed cliques for personal gain, and had coveted the position of the East Palace for a long time. The old emperor was seriously ill and the government was in turmoil. Everyone thought that the crown prince's position was about to change hands. No one knows what kind of giant dragon lurks beneath the surface of this frail prince. When the butcher's knife hung on his neck, Yan Xuanche stopped pretending and took action in a desperate situation, using the heaven and earth as a chessboard, dragging all those who despised him and wanted to get rid of him one by one into the abyss created by his own hands.